Federal judges and justices are required by law to disclose their spouse’s income — thus preventing persons who wish to influence the judge or justice from funneling money to them through their husband or wife. Yet, as the Los Angeles Times reports, Justice Clarence Thomas has not complied with this requirement for years:

Supreme Court Justice Clarence Thomas failed to report his wife’s income from a conservative think tank on financial disclosure forms for at least five years, the watchdog group Common Cause said Friday.

Between 2003 and 2007, Virginia Thomas, a longtime conservative activist, earned $686,589 from the Heritage Foundation, according to a Common Cause review of the foundation’s IRS records. Thomas failed to note the income in his Supreme Court financial disclosure forms for those years, instead checking a box labeled “none” where “spousal noninvestment income” would be disclosed. […]

Virginia Thomas also has been active in the group Liberty Central, an organization she founded to restore the “founding principles” of limited government and individual liberty.

In his 2009 disclosure, Justice Thomas also reported spousal income as “none.” Common Cause contends that Liberty Central paid Virginia Thomas an unknown salary that year.

This revelation that Justice Thomas failed to comply with his disclosure obligations comes as he is caught up in another ethics scandal regarding his participation in fundraisers for far-right political groups. Thomas once attended a gathering of wealthy corporate activists convened by billionaire Charles Koch to raise money for right-wing political causes, and he also attended at least one fundraiser hosted by the far-right think tank that used to employ his wife.

Worst of all, today’s revelation that Justice Thomas has been submitting incomplete financial disclosures suggests that the conservative justices’ engagement with corporate political advocacy could be much more widespread than previously believed. If the justices are not disclosing their activities, it’s anyone’s guess what they could be hiding.